EP2631797B1 - Thin client system with virtual machine management and server, method and program for connection management - Google Patents

Thin client system with virtual machine management and server, method and program for connection management Download PDF

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Publication number
EP2631797B1
EP2631797B1 EP13152073.6A EP13152073A EP2631797B1 EP 2631797 B1 EP2631797 B1 EP 2631797B1 EP 13152073 A EP13152073 A EP 13152073A EP 2631797 B1 EP2631797 B1 EP 2631797B1
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Prior art keywords
virtual machine
reverted
list
thin client
processing
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German (de)
English (en)
French (fr)
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EP2631797A3 (en
EP2631797A2 (en
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Satoshi Horikawa
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NEC Corp
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NEC Corp
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44—Arrangements for executing specific programs
    • G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
    • G06F9/45533—Hypervisors; Virtual machine monitors
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44—Arrangements for executing specific programs
    • G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
    • G06F9/45533—Hypervisors; Virtual machine monitors
    • G06F9/45558—Hypervisor-specific management and integration aspects
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/46—Multiprogramming arrangements
    • G06F9/50—Allocation of resources, e.g. of the central processing unit [CPU]
    • G06F9/5005—Allocation of resources, e.g. of the central processing unit [CPU] to service a request
    • G06F9/5027—Allocation of resources, e.g. of the central processing unit [CPU] to service a request the resource being a machine, e.g. CPUs, Servers, Terminals
    • G06F9/5033—Allocation of resources, e.g. of the central processing unit [CPU] to service a request the resource being a machine, e.g. CPUs, Servers, Terminals considering data affinity
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/46—Multiprogramming arrangements
    • G06F9/50—Allocation of resources, e.g. of the central processing unit [CPU]
    • G06F9/5061—Partitioning or combining of resources
    • G06F9/5077—Logical partitioning of resources; Management or configuration of virtualized resources
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44—Arrangements for executing specific programs
    • G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
    • G06F9/45533—Hypervisors; Virtual machine monitors
    • G06F9/45558—Hypervisor-specific management and integration aspects
    • G06F2009/45562—Creating, deleting, cloning virtual machine instances

Definitions

  • the present invention relates to a thin client system and, more particularly, a reverting processing execution method.
  • the thin client system which shares a virtual machine has a plurality of features as follows.
  • First feature is allowing a user to use any virtual machine as long as it is based on the same image.
  • Second feature is allowing execution of reverting processing when not used by a user.
  • Third feature is allowing reverting processing any time because no information peculiar to a user is preserved in a virtual machine.
  • a large scale thin client system having several thousands to several tens of thousands of virtual machines to be reverted has a problem of being difficulty in production of a standby system by simple virtual machine duplexing or in execution of maintenance of all the machines in the lump at a fixed maintenance time.
  • KRSUL I ET AL "VMplants: Providing and Managing Virtual Machine Execution Environments for Grid Computing", SUPERCOMPUTING, 2004.
  • PROCEEDINGS OF THE ACM/IEEE SC2004 CONFERENCE PITTSBURGH, PA, USA 06-12 NOV.2004, PISCATAWAY, NJ, USA, IEEE, 6 November 2004 presents the VMPlant architecture, describes a prototype implementation of the service, and presents an analysis of its performance.
  • US 2010/0192143 A1 is directed to providing methods, systems, and computer-readable media for deploying an updated image to nodes propagated throughout a distributed computing platform.
  • An object of the present invention is to solve the above-described problems and provide a thin client system, a connection management server, a connection management method and a connection management program which enable reverting processing to be executed efficiently in a thin client system where a virtual machine is shared among users.
  • a thin client system comprising:
  • a thin client system comprising:
  • a thin client system comprising:
  • a connection management server which manages connection between a thin client terminal and a virtual machine, comprising:
  • a connection management method by a connection management server which manages connection between a thin client terminal and a virtual machine wherein a ranking information storage unit executes the ranking information storing step of storing a to-be-reverted list in which virtual machines to be reverted are arranged in descending order of differential disk capacities, a session management unit executes the session management step of determining the virtual machine to be allocated to the thin client terminal based on the to-be-reverted list, and a maintenance processing management unit executes the maintenance processing management step of referring to the to-be-reverted list to request a virtual machine management server which executes reverting processing of a virtual machine to execute reverting processing of a virtual machine in descending order of differential disk capacities, wherein the session management step includes when available virtual machines include a virtual machine not included in the to-be-reverted list, allocating the virtual machine in question to the thin client terminal, and when all the available virtual machines are included in the to-be-reverted list, allocating
  • a computer-readable medium storing a connection management program operable on a computer forming a connection management server which manages connection between a thin client terminal and a virtual machine, which causes:
  • the present invention enables reverting processing to be executed efficiently in a thin client system where a virtual machine is shared among users.
  • Fig. 1 is a block diagram showing a structure of a thin client system 100 according to the first exemplary embodiment of the present invention.
  • the thin client system 100 according to the present exemplary embodiment comprises a connection management server 10 which manages connection, a virtual machine management server 20 which manages a group of virtual machine servers, a user information management server 30 which manages user information for use in connection, a thin client terminal 40 for use in connection to a virtual machine 51 by a user, and a virtual machine server 50 on which a plurality of virtual machines 51 (51-1 to 51-n) operate.
  • the present exemplary embodiment is structured to have one virtual machine server 50, the structure is not limited thereto.
  • the virtual machine management server 20 manages the virtual machine server 50 and the virtual machine 51 operable on the virtual machine server 50 and preserves information thereof in a virtual machine management information storage unit 21.
  • the virtual machine management information storage unit 21 stores a combination of a virtual machine name of the virtual machine 51, a virtual machine group name to which the virtual machine 51 belongs and a differential disk capacity of the virtual machine 51.
  • the user information management server 30 manages user authentication information and preserves the same in a user information storage unit 31.
  • the user information storage unit 31 stores a combination of a user name, a password and a user group to which a user belongs as shown in a user information table 310 in Fig. 3 .
  • the connection management server 10 includes a session management unit 11, a maintenance processing management unit 12 and a ranking generation unit 13.
  • the session management unit 11 obtains information of the virtual machine 51 from the virtual machine management server 20 and obtains user information from the user information management server 30. Manager sets mapping between the virtual machine 51 and the user based on these information, which setting is preserved in a connection setting management information storage unit 15.
  • the session management unit 11 requests the ranking generation unit 13 to update the ranking information storage unit 14.
  • the ranking generation unit 13 obtains information from the virtual machine management server 20 to update the ranking information storage unit 14.
  • the connection setting management information storage unit 15 includes a connection setting table 150 shown in Fig. 4 and a virtual machine state table 151 shown in Fig. 5 .
  • the connection setting table 150 preserves information of a combination between a user group name and a virtual machine group name for managing a session between a user and the virtual machine 51.
  • the virtual machine state table 151 For managing the information of each virtual machine 51, the virtual machine state table 151 preserves a virtual machine name, a user name using the virtual machine, a management state indicating whether the virtual machine 51 is being used or maintained, and a capacity of a differential disk.
  • the maintenance processing management unit 12 periodically executes maintenance processing based on information set in a maintenance processing management information storage unit 16 by a user. At the time of periodical maintenance processing, the maintenance processing management unit 12 refers to the ranking information storage unit 14 and the connection setting management information storage unit 15 to determine the virtual machine 51-i to be reverted and after updating the information of the connection setting management information storage unit 15, requests the virtual machine management server 20 to execute the reverting processing of the virtual machine 51-i.
  • the maintenance processing management unit 12 When notified of the end of the reverting processing by the virtual machine management server 20, the maintenance processing management unit 12 requests the ranking generation unit 13 to delete the information of the virtual machine 51-i from the ranking information storage unit 14.
  • the maintenance processing management information storage unit 16 preserves a batch activation time indicative of time when maintenance processing starts, a batch processing execution period when one maintenance batch is executed, and the number of simultaneously executed machines indicating how many virtual machines are reverted simultaneously by one maintenance batch as shown in a maintenance processing management table 160 in Fig. 6 .
  • Registration of information at the maintenance processing management information storage unit 16 is executed by a user.
  • the user registers a maintenance processing name at the maintenance processing management information storage unit 16 of the connection management server 10.
  • the ranking generation unit 13 obtains the information of the differential disk capacity from the virtual machine management server 20 to update the information of the ranking information storage unit 14.
  • the unit 13 also updates the information of the ranking information storage unit 14 upon receiving a request from the maintenance processing management unit 12.
  • the ranking information storage unit 14 preserves a list as indicated in a to-be-reverted list 140 shown in Fig. 7 in which a combination of virtual machine names and differential disk capacities are arranged in descending order of differential disk capacities.
  • the thin client terminal 40 sends authentication information input by the user to the session management unit 11 of the connection management server 10.
  • authentication information is assumed to be a user name and a password, it is not limited thereto.
  • the session management unit 11 refers to the ranking information storage unit 14 and the connection setting management information storage unit 15 to determine the virtual machine 51-i to be distributed to the user and sends its host name to the thin client terminal 40.
  • the thin client terminal 40 connects to the virtual machine 51-i based on the sent host name.
  • the present invention For executing reverting processing while exerting as little effect as possible on real operation of a user under a VDI environment where numbers of virtual machines exist, the present invention having the above-described structure repeats operation of periodically executing reverting processing with respect to a part of a group of virtual machines, thereby executing operation of reverting all the virtual machines.
  • the ranking information also for virtual machine distribution processing allows a user to use as small the number of virtual machines to be reverted as possible. This enables the reverting processing to be efficiently executed with respect to all the virtual machines.
  • maintenance processing of the virtual machine 51 is executed by the following manner by the maintenance processing management unit 12.
  • a manager registers periodical maintenance processing at the maintenance processing management unit 12. More specifically, the manager registers "maintenance batch activation time”, “maintenance batch processing execution period” and "the number of machines whose maintenance is simultaneously executed” (S100 and S101 in Fig. 8 ).
  • the maintenance processing management unit 12 starts batch processing at batch activation time set by the manager (S200 in Fig. 9 ). First, since the batch processing is executed for a period of time designated by the user, determine whether the batch processing time period designated by the user has elapsed or not (S201 and S202 in Fig. 9 ) and when it is yet to be elapsed, continue the processing.
  • the maintenance processing management unit 12 requests the virtual machine management server 20 to revert the virtual machine 51-i (S206 in Fig. 9 ).
  • the virtual machine management server 20 executes reverting processing of the virtual machine 51-i and when completing the processing, notifies the maintenance processing management unit 12 of the end of the processing (S207 in Fig. 9 ).
  • the maintenance processing management unit 12 Upon receiving the notification of the end of the reverting processing, the maintenance processing management unit 12 changes the management state of the virtual machine 51-i in the virtual machine state table 151 to "available" to request the ranking generation unit 13 to delete the virtual machine 51-i in question from the machines to be reverted (S208 in Fig. 9 ).
  • the ranking generation unit 13 deletes the virtual machine 51-i from the to-be-reverted list 140 (S209 in Fig. 9 ).
  • the session management unit 11 allocates the virtual machine 51 by the following manner (S300 in Fig. 10 ).
  • the user enters an account and a password through the thin client terminal 40 (S301 in Fig. 10 ).
  • the thin client terminal 40 transfers the entered information to the session management unit 11, so that the session management unit 11 refers to the connection setting table 150 to determine a virtual machine group for use in distribution (S302 in Fig. 10 ).
  • the session management unit 11 refers to the virtual machine state table 151 to make a list of virtual machines including virtual machines 51 extracted whose management state is "available" (S303 in Fig. 10 ). Then, the session management unit 11 refers to the to-be-reverted list 140 to determine whether there exists in the virtual machine list made a virtual machine 51 not included in the to-be-reverted list 140 (S304 in Fig. 10 ).
  • the session management unit 11 selects an arbitrary virtual machine 51-i as a virtual machine to be distributed from among the virtual machines 51 not included in the to-be-reverted list 140 (S305 in Fig. 10 ).
  • the session management unit 11 selects a lastly listed virtual machine 51-i which has the smallest differential disk capacity among those in the to-be-reverted list 140 as a virtual machine to be distributed to request the ranking generation unit 13 to delete the virtual machine 51-i in question from the to-be-reverted list 140 (S306 in Fig. 10 ).
  • the ranking generation unit 13 deletes the virtual machine 51-i in question from the to-be-reverted list 140 (S307 in Fig. 10 ).
  • the session management unit 11 When selecting the virtual machine 51-i to be distributed, the session management unit 11 changes the management state of the virtual machine 51-i in question in the virtual machine state table 151 to "in use” to update the user name with the information entered through the thin client terminal 40.
  • the session management unit 11 notifies the thin client terminal 40 of a virtual machine name of the virtual machine 51-i to be distributed (S308 in Fig. 10 ).
  • the thin client terminal 40 connects to the virtual machine 51-i based on the virtual machine name notified by the session management unit 11 (S309 in Fig. 10 ).
  • the session management unit 11 when detecting the disconnection of the virtual machine 51-i, the session management unit 11 returns the management state of the virtual machine 51-i in question in the virtual machine state table 151 to "available", as well as deleting the relevant user name. Thereafter, the unit 11 requests the ranking generation unit 13 to add the virtual machine 51-i in question to the to-be-reverted list 140 (S401 in Fig. 11 ).
  • the ranking generation unit 13 obtains information of the differential disk capacity of the virtual machine 51-i from the virtual machine management server 20 (S402 in Fig. 11 ). Next, the ranking generation unit 13 searches a differential disk capacity column of the to-be-reverted list 140 to insert a column of a differential disk capacity and a virtual machine name in an appropriate position which satisfies a large-small relationship among differential disk capacities (S403 in Fig. 11 ).
  • the present exemplary embodiment enables all the virtual machines to be reverted while appropriately controlling loads that the reverting processing places on the system.
  • the reason is that executing the reverting processing not upon user log-off or the like but during time and by the number of virtual machines defined by a manager enables execution of the reverting processing while controlling loads on the system by the manager.
  • the present exemplary embodiment also enables efficient reduction of a disk space of the entire system.
  • Example of a minimum structure that can solve the problems of the present invention is shown in Fig. 18 .
  • the thin client system 100 comprising the virtual machine server 50 on which the virtual machines 51 operates, the thin client terminal 40 which connects to the virtual machine 51, the connection management server 10 which manages connection between the thin client terminal 40 and the virtual machine 51, and the virtual machine management server 20 including the reverting processing execution unit which executes the reverting processing of the virtual machine 51, the connection management server 10 including the ranking information storage unit 14 which stores the to-be-reverted list 140 in which the virtual machines 51 to be reverted are arranged in descending order of differential disk capacities, the session management unit 11 which determines a virtual machine to be allocated to the thin client terminal 40 based on the to-be-reverted list 140, and the maintenance processing management unit 12 which refers to the to-be-reverted list 140 to request the virtual machine management server 20 to execute the reverting processing in descending order of differential disk capacities, the above-described problems of the present invention can be solved by, when available
  • Fig. 12 is a diagram showing an example of a structure of the virtual machine state table 151 according to the present exemplary embodiment.
  • Fig. 13 is a diagram showing an example of a structure of the maintenance processing management table 160 according to the present exemplary embodiment.
  • the virtual machine state table 151 further includes information of the user name used last as compared with the first exemplary embodiment shown in Fig. 5 .
  • the user name used last a user name which has last used the virtual machine in question is preserved.
  • the maintenance processing management table 160 further includes a differential disk capacity threshold value as compared with the first exemplary embodiment shown in Fig. 6 .
  • Differential disk capacity threshold value is used for determining whether information of the user name used last should be preserved or not.
  • the maintenance processing of the virtual machine 51 will be executed by the following manner at the maintenance processing management unit 12.
  • the manager registers periodical maintenance processing at the maintenance processing management unit 12. More specifically, the manager registers "differential disk capacity threshold value" in addition to “maintenance batch activation time”, “maintenance batch processing execution period” and “the number of simultaneously executed machines” (S101A in Fig. 14 ).
  • Fig. 15 is the same as Fig. 9 except S208A, no description will be made of other parts than S208A.
  • the maintenance processing management unit 12 Upon receiving a target virtual machine reversion end notification, the maintenance processing management unit 12 changes the management state of the virtual machine 51-i in the virtual machine state table 151 to "available", as well as deleting the user name used last, and further requests the ranking generation unit 13 to delete the target virtual machine 51-i from the machines to be reverted (S208A in Fig. 15 ).
  • the system operates in a manner as shown in Fig. 16 at the time of virtual machine distribution. Since operation of S300A to S309A in Fig. 16 is the same as that of S300 to S309 in Fig. 10 , no description will be made thereof.
  • the session management unit 11 selects the virtual machine 51-i in question as a virtual machine to be distributed to request the ranking generation unit 13 to delete the virtual machine 51-i in question from the to-be-reverted list 140 (S311A in Fig. 16 ).
  • the ranking generation unit 13 deletes the virtual machine 51-i in question from the to-be-reverted list 140 (S312A in Fig. 16 ).
  • the session management unit 11 When selecting the virtual machine 51-i to be distributed, the session management unit 11 changes the management state of the virtual machine 51-i in the virtual machine state table 151 to "in use” and updates the user name with the information input through the thin client terminal 40 to notify the thin client terminal 40 of the virtual machine name of the virtual machine 51-i to be distributed (S308A in Fig. 16 ).
  • the ranking generation unit 13 obtains information of the differential disk capacity of the virtual machine 51-i from the virtual machine management server 20 (S402A in Fig. 17 ). Next, the ranking generation unit 13 determines whether the differential disk capacity of the virtual machine 51-i in question is not more than a differential disk capacity threshold value set by the manager (S404A and S405A in Fig. 17 ).
  • the ranking generation unit 13 notifies the session management unit 11 to that effect, so that the session management unit 11 preserves a user name having used the virtual machine 51-i in question before disconnection as the user name used last in the virtual machine state table 151 (S406A in Fig. 17 ).
  • the ranking generation unit 13 executes updating processing of the to-be-reverted list (S403A in Fig. 17 ).
  • the ranking generation unit 13 executes the updating processing of the to-be-reverted list without particularly executing the updating processing of the user name used last (S403A in Fig. 17 ).
  • the present exemplary embodiment enables an increase in a differential disk space to be prevented because distributing the same virtual machine as a virtual machine used last at the time of distribution of a virtual machine to each user leads to suppression of user profile production at the time of new log-in at each virtual machine.
  • Fig. 21 is a block diagram showing an example of a hardware configuration of the connection management server 10.
  • the connection management server 10 of the present invention which has the same hardware configuration as that of a common computer device, comprises a CPU (Central Processing Unit) 2101, a main storage unit 2102 formed of a memory such as a RAM (Random Access Memory) for use as a data working region or a data temporary saving region, a communication unit 2103 which transmits and receives data through a network, an input/output interface unit 2104 connected to an input device 2105, an output device 2106 and a storage device 2107 to transmit and receive data, and a system bus 2108 which connects each of the above-described components with each other.
  • the storage device 2107 is realized by a hard disk device or the like which is formed of a non-volatile memory such as a ROM (Read Only Memory), a magnetic disk or a semiconductor memory.
  • connection management server 10 of the present invention has its operation realized not only in hardware by mounting a circuit part as a hardware part such as an LSI (Large Scale Integration) with a program incorporated but also in software by storing a program which provides the function in the storage device 2107, loading the program into the main storage unit 2102 and executing the same by the CPU 2101.
  • LSI Large Scale Integration
  • the thin client terminal 40, the virtual machine server 50, the virtual machine management server 20 and the user information management server 30 of the present invention also have such hardware configuration as described above to realize the respective functions of the thin client terminal 40, the virtual machine server 50, the virtual machine management server 20 and the user information management server 30 in hardware or software.
  • the respective components of the present invention need not exist independently, and the plurality of the components may be formed as one member, one component may be formed of a plurality of members, a certain component may be a part of other component, a part of a certain component and a part of other component may overlap with each other, or the like.
  • the order of recitation does not limit the order of execution of the plurality of procedures. Accordingly, when executing the method and the computer program of the present invention, the order of the plurality of procedures can be changed within the range not hindering the contents.
  • execution of the plurality of procedures of the method and the computer program of the present invention is not limited to execution at different timing with each other. Therefore, during execution of a certain procedure, other procedure might occur, a part or all of execution timing of a certain procedure and execution timing of other procedure might overlap with each other, or the like.

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  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
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JP2012037602A JP5862359B2 (ja) 2012-02-23 2012-02-23 シンクライアントシステム、接続管理サーバ、接続管理方法、及び接続管理プログラム

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CN103297412B (zh) 2017-12-26
US20130227567A1 (en) 2013-08-29
EP2631797A3 (en) 2015-01-14
JP2013174945A (ja) 2013-09-05
EP2631797A2 (en) 2013-08-28
JP5862359B2 (ja) 2016-02-16
CN103297412A (zh) 2013-09-11
US9110696B2 (en) 2015-08-18

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